In the hour, entitled “Double Helix,” we got flashbacks that filled in the blanks about why Rowan’s med-school romance with geneticist Lark (Ben Feldman) in San Francisco came to an end.
Lark reentering Rowan’s life at this particular juncture will help “show the two sides of her, the scientist and the witch, at war over the course of the season.” The premiere also expands ...